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8/31/2013 9:26 P.M. ET

Coliseum quirk puts Rays closer in lockdown

OAKLAND -- Opposing teams should know by now that playing at the Coliseum can be a tricky proposition.

In July, the Mariners ended a game to find a swamp of sewage that had backed up through the drains and into the team clubhouse. And on Friday, the stadium's quirks could have affected the Rays' bullpen situation.

Tampa Bay closer Fernando Rodney found himself locked in bathroom of the visiting dugout for about 15 minutes in Friday's series opener, before the door handle was finally broken to rescue him from the clutches of the lavatory.

The Rays took the episode lightly, hounding Rodney in faux celebration midway through the eighth inning, but whether the game presented a situation in which his services would have been required begs a question of etiquette.

"There's some events that take place in this building that maybe not so much in others," A's manager Bob Melvin said. "For a guy who's that important and whether or not they were having him warm up, I'm sure there was a little trepidation going on with that. If it doesn't affect things, it's kind of funny."

"I've actually been in there a couple of times where I had a little trouble getting out of there," Melvin added. "Not to the extent of last night. I would think that you could potentially stop the game if you have a guy that you're expecting to go in and he can't get out. I would probably have to go to the umpires and explain the situation."

Jaso awaiting clearance to begin rehab work

OAKLAND -- If John Jaso is to rejoin the team before the season's end, he likely won't have the opportunity to use the Minor League system for rehab work.

Oakland's left-handed-hitting backstop, who has been on the disabled list for more than a month with a concussion, has yet to take batting practice, and Monday marks the end of the Minor League seasons.

When Jaso does feel healthy enough to play, A's manager Bob Melvin said the best course of action would be to get him at-bats in simulated games.

"When I talked to him yesterday, he's feeling better about getting some swings in and he's pretty antsy about getting out and hopefully getting some at-bats somewhere," Melvin said. "We still haven't ruled him out potentially being a piece for us in September. It's just making sure he gets the clearance and going at the pace the doctor says."

Donaldson fitting right in at two-spot for A's

OAKLAND -- Josh Donaldson has been the A's most consistent bat this season, and manager Bob Melvin has utilized his effective third baseman by moving him up to the second spot in the lineup.

Donaldson has batted second in each of his past four starts -- his first starts in the two-spot this season -- and hit safely in each game. Additionally, he's hitting .313 with 15 runs scored and 16 RBIs over his past 22 games after failing to drive in a run in his previous 17 contests.

"On a day when we have our lefties in there, it splits my righties up a little bit more," Melvin said of the move. "It's a key spot in the lineup, so whether he's hitting two, three, four or five, all of those spots are potential run-producing spots, and he's shown that he can acclimate to a certain spot in the lineup.

"I don't think he thinks any differently, but at times you make some tweaks for the lineup just depending on how you're doing, and so far he's been pretty good in that two-hole."

Worth noting

• Opening Day starter Brett Anderson, who returned from the disabled list Wednesday after missing four months with a stress fracture in his right foot, is available to pitch out of the bullpen if needed Saturday, manager Bob Melvin said. The skipper added that Anderson will definitely be available in Sunday's series finale against the Rays.

• With the calendar turning to September on Sunday, Melvin said he expects three players to join the A's expanded roster, though he didn't mention any names. On Tuesday, even more should be bumped up to the big league club as the Minor League seasons end.

Jeff Kirshman is an associate reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.